Earth-auger.



G. T. STOTT.

EARTH AUGER.

'APPLIGATION FILED 1111.4, 1910.

993,903. Patented May 30, 1911.

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EARTH AUGER.

APPLICATION FILED JAN.4, 1910. 993,903., Patented May 30, 1911.

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G. T. STOTT.

EARTH AUGER.

APPLICATION FILED 11111.4, 1910.

Patented May 30, 1911.

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PATENT OFFTQEE.

GRQVER T. STOTT, OF NE'W CARLISLE, OHIO.

EARTH-AUGER.

Application filed January 4, 1910.

T all whom it may concern:

Be it known that I, Gnovnn T. Srorr, a citizen of the United States,residing at New Oarlisle, in the county of Clark, State of Ohio, haveinvented certain new and useful Improvements in Earth-Angers; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to that class of tools known as earth augers orpost hole diggers.

One object of the invention is to improve and simplify the generalconstruction of devices of this character so that they maybe used invarious kinds of earth and fed into the earth mechanically at varyingspeeds, depending on the quality of the earth.

Another object of the invention is the provision of a means whereby themechanical feed may be reversed so that the auger may be removed fromthe hole which it has dug, the speed of removal being as high as may bedesired.

Vith the above and other objects in View, the invention consists ingeneral of a frame whereon is mounted an improved boring and feedingmechanism.

The invention further consists in certain novel details of constructionand combinations of parts hereinafter fully described, illustrated inthe accompanying drawings, and specifically set forth in the claim.

In the accompanying drawings, like characters of reference indicate likeparts in the several views, and :Figure 1 is a front elevation of anearth auger constructed in accordance with this invention. Fig. 2 is aside elevation of this earth auger. Fig. 3 is a section on the line 33of Fig. 1. Fig. 4 is a section on the line 44 of Fig. 1. Fig. 5 is asection on the line 5-5 of Fig. 1. Fig. 6 is a detail perspective Viewof a portion of the change feed gear.

The numeral 10 indicates the base or floor of the framework and thisbase or floor is mounted on suitable wheels 11 which enable it to bereadily moved from place to place as occasion may require. Extendingupward from the base 10 are standards 12 which are securely braced tothe base by brace irons 13. Across the top of these standards extends aframe member 14 and adjacent the bottoms thereof are spacedSpecification of Letters Patent.

Patented May 36, 1911.

Serial No. 536,373.

j frame members 15 and 16. The frame members 14 and 16 are also bracedas indicated respectively at 17 and 18. Between the frame members 14 and15 guides 19 are secured to the inner sides of the frame members 12.

At 20 are indicated boxings through which passes a boring bar 21 havinga suitable boring head 22 on the lower end thereof. On the upper end ofthis boring bar is located a collar 23 and on this collar is supported across head 24 at each end of which is a T-arm 25, the heads of the Tscarrying grooved rollers 26 which are mounted in parallelism on saidT-arms and the grooves of which engage over the guides 19. Passingthrough the frame member 14 is a feed screw 27 the lower end of which isswivelcd to the boring bar 21 as indicated at 28. This feed screw isprovided with a splineway 27 On top of the member 14 is a bracket 29wherethrough the feed screw passes and resting on the member 14 is abevel gear 30 provided with a suitable centrally disposed threadedopening to engage the feed screw 27. Fitting in the splineway of thescrew and in the opening in the bracket 29 is a It is to be noted thatthe location of the cross head 24 is such that as the boring bar 21 isforced down by the rotation of the gear 30 the cross head will supportthe swivel joint and prevent any lateral movement and consequent injurythereto.

Running through the bracket 29 and having its opposite end held in abearing 31 is a shaft 32 which is provided with a bevel gear 33 whichmeshes with the gear 30. On the end of this shaft 32 is a friction disk34. At 35 is a bracket which is secured to the frame and which isprovided with a portion 36 parallel to a shaft 37 which is held inbearings 38 and extends vertically beside one of the frame members 12.The portion 36 of the bracket is slotted as indicated at 39 and in thisslotted portion is a T-shaped clamping member 40 provided with athreaded stem 41 whereon is held a clamp nut 42 adapted to lock themember 40 in adjusted position relative to the slot 39. Projecting fromthe member 40 in the direction of the disk 34 is an arm 43 having a fork44 on its extremity and this fork is arranged to engage in a groove 45formed in a friction roller 46 which is splined to the upper end of theshaft 37 and which bears firmly spline the head of which is indicated at29'.

against the disk 34 so that as the shaft 37 is rotated the disk 34 willalso be rotated.

N ow, it will be obvious that if the shaft 37 be continuously rotated inone direction and the roller 46 shifted to engage the disk 34 above orbelow its axis the direction of rotation of this disk and consequentlyof the shaft 32 will be changed. By this means the direction of rotationof the nut gear 30 may also be changed and the boring bar be fed down orup as may be desired. Furthermore, it will also be obvious that ifuniform rotation be imparted to the shaft 37 and the friction roller 46moved in from the periphery of the disk 34 toward the center the saiddisk will be rotated more rapidly as the roller approaches the center.By this means the feed may be regulated as to speed and direction, itbeing merely necessary to loosen the nut 42 and adjust it as desired.

Splined upon the boring bar 21 between the members 15 and 16 is a bevelgear 47 and meshing with this bevel gear is a pinion 48 carried on ashaft 49 mounted in bearings 50 on the frame. The shaft 49 has alsomounted thereon a gear 51 which meshes with a pinion 52 on the shaft 37so that as the shaft 49 is rotated the shaft 37 will also be rotated andthe feed mechanism thereby actuated. In order to drive the shaft 49suitable means are provided such as is indicated by the belt pulley 53which may also have a crank handle 54 secured thereto in order tooperate the device by hand.

In the operation of this device the machine is drawn to the point whereit is desired to bore a post hole and the roller 46 moved to give thefeed screw 27 a rapid downward feed. The shaft 49 is then rotated in anypreferred manner until the boring head 22 engages with the ground. Whenthis is done the feed mechanism is so positioned as to meet therequirements of the occasion, it being understood that the harder theground the slower the feed will naturally be, and

' the boring operation proceeded with. When the hole has been bored tothe required depth the feed is reversed and set for high speed and theshaft 49, continuing to rotate, will cause the boring head to bewithdrawn from the hole just bored. The machine may then be moved to anew location and the operation repeated.

There has thus been provided a simple and efiicient device of the kinddescribed and for the purpose specified.

It is obvious that minor changes may be made in the form andconstruction of this invention without departing from the ma terialprinciples thereof. It is not therefore desired to confine the inventionto the exact form herein shown and described, but it is wished toinclude all such as properly come within the scope of the appendedclaim.

Having thus described the invention, what is claimed as new, is

In an earth auger, a frame, a boring bar slidably and rotatably mountedtherein, a feed screw swiveled to the boring bar, a bevel gear having athreaded opening therethrough engaged on said feed screw, means to drivethe boring bar, and an operative connection between said means and saidbevel gear comprising a shaft operated by said means, a bracket on saidframe provided with a portion parallel to the shaft and having a slotlongitudinally thereof, a friction roller splined on the shaft andprovided with a circumferential groove, a clamp mounted on the slottedportion of the bracket, an arm projecting from the clamp and providedwith a forked end engaging said groove, a second shaft, a second bevelgear on the second shaft meshing with the first bevel gear, and afriction disk carried on the second shaft and against which said rollerbears.

In testimony whereof, I afliX my signature, in presence of twowitnesses.

GROVER T. STOTT.

Witnesses:

FREDERICK JENKINS, JOHN HARTMAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

